Answered: 3. Describe how the NADH produced in…

3. Describe how the NADH produced in the cytosol by glycolysis is able to feed electrons into the mitochondrial electron-transport chain.

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter7: Cellular Respiration: Harvesting Chemical Energy

Section: Chapter Questions

Problem 4TYK

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3. Describe how the NADH produced in the cytosol by glycolysis is able to feed electrons into the
mitochondrial electron-transport chain.

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Step 1: Explaining why NADH produced in cytosol cannot cross mitochondria

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Step 2: Explaining malate aspartate shuttle

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Step 3: Explaining glycerol phosphate shuttle

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2. Mitochondria isolated from bovine cardiac muscle, when subjected to sonication, form closed mem- brane vesicles containing the electron transport catalysts and the ATP synthase enzyme located in the inner mitochondrial membrane. A diagrammatic representation of these electron transport particles retaining the capacity for oxidative phosphorylation is given below. NADH NAD+ ( ATP tion? H₂O ADP 1/202 NADH Q₁H₂ NAD+ Q₁ Complex I Complex III ADP Complex IV ATP In the diagram protein complexes colored gray indicate that they are inhibited while complexes colored red, green, etc. are catalytically active. Complex II (a)( In Panel A indicate which side of the membrane vesicle faced the matrix and which side faced the intermembrane space prior to sonication. During coupled substrate oxidation which compart- ment will be of higher pH and which of lower pH. (b) For the system in Panel A, sonication of mitochondria was carried out in the presence of an excess of ferricytochrome c (i.e., the…
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1. When combined with the electron transport chain, ONE turn of the citric acid cycle produces ___________ATP. The citric acid cycle is shown below. 2. When all the NADH coenzymes generated from ONE turn of the citric acid cycle enter the electron transport chain, how many ATP molecules are produced?
2. Mitochondria isolated from bovine cardiac muscle, when subjected to sonication, form closed mem- brane vesicles containing the electron transport catalysts and the ATP synthase enzyme located in the inner mitochondrial membrane. A diagrammatic representation of these electron transport particles retaining the capacity for oxidative phosphorylation is given below. NADH NAD+ H₂O tion? 1/202 Q₁H₂ NADH- NAD+ Complex I Complex III ADP Complex IV Complex II ATP ADP ATP In the diagram protein complexes colored gray indicate that they are inhibited while complexes colored red, green, etc. are catalytically active. (a) In Panel A indicate which side of the membrane vesicle faced the matrix and which side faced the intermembrane space prior to sonication. During coupled substrate oxidation which compart- ment will be of higher pH and which of lower pH. (b) For the system in Panel A, sonication of mitochondria was carried out in the presence of an excess of ferricytochrome c (i.e., the heme…
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